Cheap flights from Dublin to Chicago from £351

The cheapest month to fly to Chicago from Dublin is in September. Flight prices, which tend to average around £203, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to Chicago from Dublin during January instead. Flights to Chicago in January, while not as cheap as those in September, still average around £272.

The cheapest day to depart on your flight to Chicago is on a Tuesday when prices can be found for as low as £539. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Chicago is Saturday, with ticket prices averaging around £660.

Flying to Chicago from Dublin in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as £480 when looking at flights departing in the afternoon. Flights in the morning are often more expensive, with an average ticket price of £617.

Fly from Dublin to Chicago O'Hare Intl for the best Dublin - Chicago flight prices

You are more likely to see cheaper flights to Chicago from Dublin when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around £500 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from Dublin for as low as £423 on momondo.

There are 3 cabin classes available to choose from on Dublin to Chicago flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

JetBlue and TAP AIR PORTUGAL are the most popular carriers operating from Dublin to Chicago

Aer Lingus, Finnair and United Airlines are the top three most popular airlines that fly to Chicago from Dublin according to our data. Aer Lingus is the first choice among our users, with 58% of people opting to fly with this airline when travelling to Chicago. Keep in mind that there are 4 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.

Historically, on average around 13% of flights between Dublin and Chicago have experienced a delay on any given week. The average delay length over the past 12 months has been 143 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing in the morning have, in the past, seen delays more frequently in comparison.

Monday is statistically the day of the week that experiences the fewest delays on this flight route. Tuesday has historically seen more delays on average compared to the rest of the week.

According to our data, Aer Lingus have had the fewest delays on this route over the last 12 months, with about 8% of their flights experiencing any sort of delay.

Reykjavik (KEF) was the most common stop: 75% of momondo users choosing one-stop flights on this route connected there.

Flights via Reykjavik (KEF) offer the lowest average return price of £272.

Flights connecting via London (LHR) have the shortest average one-way travel time: 11h 45m.

London (LHR) has the shortest average stopover time for this route: 1h 38m.

As of June 2026, 19 flights take off from Dublin and land in Chicago each day. The most common flight departure time for this route is 11:00, with 78% of daily flights taking off at midday.

As of June 2026, 134 flights take off from Dublin and land in Chicago each week. The most common flight departure day for this route is Thu, with 15% of weekly flights taking off on this day.